this murder, this case gives us a sharp insight into how some people end up dead in the streets of our city. he's been in a lot of trouble, hasn't he? >> yes, he has. and i've had it. i'm done. >> reporter: that's the aunt of austin. she had custody of the teenager for some time. the aunt says back in 2008, there was a fire at the austin family home in northeast. kevon austin was held responsible for the arson. the aunt says he was sent to a juvenile facility here. then a juvenile facility in florida for a year. then a group home here. then placed in her custody after that. now comes the charge of murder. >> i tried to do my best to, you know, to try to give him an environment in which he could grow, and, you know, get educated, or get a job or something. but he just kept going in and out of the system. and after this last incident, i'm just done. >> reporter: at the time of the murder, kevon austin was wearing a gps tracking device on his ankle. but right before the murder, it stops working. how did that happen. indeed, there are a lot of questions here, including one from toni troxler. sh